JP2651126B2 - Automotive fuel supply system with otto-cycle engine - Google Patents

Automotive fuel supply system with otto-cycle engine

Info

Publication number
JP2651126B2
JP2651126B2 JP6324803A JP32480394A JP2651126B2 JP 2651126 B2 JP2651126 B2 JP 2651126B2 JP 6324803 A JP6324803 A JP 6324803A JP 32480394 A JP32480394 A JP 32480394A JP 2651126 B2 JP2651126 B2 JP 2651126B2
Authority
JP
Japan
Prior art keywords
fuel
supply system
pump
fuel supply
fuel tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP6324803A
Other languages
Japanese (ja)
Other versions
JPH07286564A (en
Inventor
エルヴィン、ブルンホーファー
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TEKUNOFURO TEYUUBU SHISUTEMUZU GmbH
Original Assignee
TEKUNOFURO TEYUUBU SHISUTEMUZU GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TEKUNOFURO TEYUUBU SHISUTEMUZU GmbH filed Critical TEKUNOFURO TEYUUBU SHISUTEMUZU GmbH
Publication of JPH07286564A publication Critical patent/JPH07286564A/en
Application granted granted Critical
Publication of JP2651126B2 publication Critical patent/JP2651126B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、噴射弁を有する燃料噴
射系統を具備するオット−サイクルエンジン付自動車用
燃料供給系統であって、燃料タンク、ポンプ、燃料タン
クから噴射弁への往路配管系統、及び噴射弁から燃料タ
ンクへの復路配管系統を有し、燃料タンクが換気装置を
備え、更に大気から隔てられている燃料供給系統に関す
る。往路配管系統の特徴は、一段、多段及び分岐された
往路配管である。この概念が復路配管系統にも当てはま
る事は自明である。燃料タンク内は、大気圧、又は超過
圧力とすることも出来る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply system for an automobile with an otto-cycle engine having a fuel injection system having an injection valve, comprising a fuel tank, a pump, and an outward piping system from the fuel tank to the injection valve. And a return line from the injector to the fuel tank, wherein the fuel tank is provided with a ventilator and is further isolated from the atmosphere. The feature of the outward piping system is a single-stage, multi-stage, and branched outward piping. It is self-evident that this concept also applies to the return piping system. The interior of the fuel tank can be at atmospheric pressure or overpressure.

【０００２】[0002]

【従来の技術】上述の基本的構成の燃料供給系統は、一
般に使用されており、実証済みである。当該燃料供給系
統には、著しい機械的応力が作用し、それに応じた設計
がなされている。また、変化する熱応力にも曝されるの
で、その結果として生ずる熱膨張を受容するように調整
されている。燃料供給系統内への熱の影響は、止むを得
ないとされている。これは欠点であり、且つ燃料の気化
により環境への影響を与える燃料損失を招き、またオッ
ト−サイクルエンジンの運転にとって不利な燃料変質が
生ずる。燃料中の気化しやすい成分は、分離する。2. Description of the Prior Art The fuel supply system of the basic construction described above is commonly used and has been proven. Significant mechanical stress acts on the fuel supply system, and the fuel supply system is designed accordingly. It is also tuned to accommodate the resulting thermal expansion as it is also exposed to changing thermal stresses. The effects of heat on the fuel supply system are unavoidable. This is a drawback and leads to environmentally harmful fuel losses due to fuel vaporization and also to fuel alteration which is disadvantageous for the operation of the Otto-cycle engine. Components that are easily vaporized in the fuel are separated.

【０００３】[0003]

【発明が解決しようとする課題】本発明は、オット−サ
イクルエンジン付自動車用の燃料供給系統において、燃
料気化による燃料損失及び燃料変質を低減する技術的問
題を解決することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the technical problem of reducing fuel loss and fuel deterioration due to fuel vaporization in a fuel supply system for an automobile with an otto-cycle engine.

【０００４】[0004]

【課題を解決するための手段】この技術的問題を解決す
るため、本発明が対象とするものは、噴射弁を有する燃
料噴射装置を具備するオット−サイクルエンジン付自動
車用燃料供給系統であって、燃料タンク、ポンプ、燃料
タンクから噴射弁への往路配管系統、及び噴射弁から燃
料タンクへの復路配管系統を有し、燃料タンクが換気装
置を備え、且つ更に大気から隔てられている、燃料供給
系統において、 ａ）燃料タンク、ポンプ、往路配管系統及び噴射弁によ
って燃料供給装置を形成し、噴射弁に供給される燃料の
流量が５乃至４０％だけ、とりわけ１０乃至３０％だ
け、燃料消費量に相当する流量よりも大きくなるよう
に、オット−サイクルエンジンの作動中にそのポンプが
操作され、 ｂ）復路配管系統がオ−バ−フロ−弁を介して噴射弁に
接続されており、そのオ−バ−フロ−弁が過剰流量を復
路配管系統内に導入し、ｃ）オ−バ−フロ−弁が、オット−サイクルエンジン用
の始動操作装置によって、及び／又はオット−サイクル
エンジン始動の際のポンプの圧力によって、開放状態に
操作可能となっており、 オ−バ−フロ−弁が噴射弁内の
燃料圧力を一定に保持するために装備されていることを
特徴とする自動車用燃料供給系統である。SUMMARY OF THE INVENTION In order to solve this technical problem, the present invention is directed to a fuel supply system for an automobile with an otto-cycle engine having a fuel injection device having an injection valve. A fuel tank, a pump, a forward piping system from the fuel tank to the injection valve, and a return piping system from the injection valve to the fuel tank, wherein the fuel tank is provided with a ventilator, and further separated from the atmosphere. In the supply system: a) A fuel supply system is formed by a fuel tank, a pump, an outgoing piping system and an injection valve, and the flow rate of fuel supplied to the injection valve is 5 to 40%, especially 10 to 30%, and the fuel consumption is increased. The pump is operated during operation of the Otto-cycle engine so as to be greater than the flow rate corresponding to the quantity; b) the return line is injected via an overflow valve; It is connected to the valve, the O - bar - flow - valve introduces excess flow to return pipe system, c) O - bar - flow - valve, Otto - a cycle engines
Starting operation and / or otto-cycle
Open due to pump pressure when starting the engine
An automobile fuel supply system operable and provided with an overflow valve for maintaining a constant fuel pressure in the injection valve.

【０００５】本発明の枠内で、オ−バ−フロ−弁は、追
加的にオット−サイクルエンジン用の始動操作装置を介
して、及び／又はオット−サイクルエンジンの始動の際
のポンプの圧力を介して、開放位置に操作可能である。
オ−バ−フロ−弁がオット−サイクルエンジンの始動の
際に、ポンプの圧力を介して操作されると、オット−サ
イクルエンジンの始動により圧力インパルスが発生する
ように、ポンプが操作又は制御され、一方、更にポンプ
はオット−サイクルエンジンの作動の際、及び噴射弁内
のあらゆる運転条件のもとで、噴射弁内に一定の静的燃
料圧力を維持する。[0005] In the context of the present invention, the overflow valve is additionally provided via a start-up operating device for the Otto-cycle engine and / or the pressure of the pump at the start-up of the Otto-cycle engine. Can be operated to the open position via.
If the overflow valve is actuated via the pressure of the pump during start-up of the Ot-cycle engine, the pump is operated or controlled such that starting the Ot-cycle engine produces a pressure impulse. On the other hand, the pump also maintains a constant static fuel pressure in the injector during operation of the Otto-cycle engine and under all operating conditions in the injector.

【０００６】本発明は、オット−サイクルエンジン付自
動車用燃料供給系統に対して、多数の熱源、すなわち駆
動部を有する燃料ポンプ、復路配管系統を介して還流す
る燃料に熱を放出する、エンジンブロックに配置された
噴射弁、燃料タンクの近くに配置されている場合の排気
装置、及び走行運転の際に加熱される自動車の変速装
置、などが影響を与えるという事実を考慮したものであ
る。更に、太陽光線及び高温のエンジン排気による熱伝
導が行われ、これらが往路配管系統及び復路配管系統、
並びに燃料タンクに対して影響を与える。本発明は、上
記熱源等の望ましくない影響は、前記の特徴によって、
著しく軽減させることが出来、従って、もはや望ましく
ない燃料気化がそれに起因する欠陥ともども発生しない
という認識から発するものである。往路配管系統内、噴
射弁内、及び復路配管系統内においては、障害となる熱
の影響に十分対処できるように、燃料の滞留時間が短縮
される。燃料タンクは効果的に断熱性の絶縁がなされて
いる。The present invention provides an engine block for an automotive fuel supply system with an otto-cycle engine, which emits heat to a plurality of heat sources, that is, a fuel pump having a drive unit, and fuel returned through a return piping system. , The exhaust system when located near the fuel tank, and the transmission of the motor vehicle that is heated during driving. Furthermore, heat conduction is performed by sunlight and high-temperature engine exhaust, and these are the outbound piping system and the inbound piping system,
And has an effect on the fuel tank. According to the present invention, the undesired effects of the heat source and the like are caused by the aforementioned characteristics.
It can be significantly reduced, and thus stems from the recognition that undesirable fuel vaporization no longer occurs with the defects associated therewith. In the forward piping system, the injection valve, and the return piping system, the residence time of the fuel is shortened so as to sufficiently cope with the effect of the heat which is an obstacle. The fuel tank is effectively insulated.

【０００７】詳細にいうならば、本発明の枠内では、更
に多くの形態及び構成の可能性が講ぜられている。常に
望ましいことは、８０％以上の効率を示し、且つその結
果、ほんのわずかしか熱損失を生じないようなポンプで
作動することである。ポンプは燃料タンク内に配置する
ことが出来る。しかし、作動するポンプによって生ずる
熱を燃料タンクから切り離すことが望ましい。これは、
それに応じた熱伝導を阻止する方策、或いは断熱のため
の方策を通じて行うことが出来るが、またそれは、ポン
プを燃料タンク外に配置することによっても行うことが
出来る。[0007] More specifically, within the framework of the present invention, many more configurations and configurations are possible. It is always desirable to operate with a pump that exhibits an efficiency of 80% or more and results in only a small loss of heat. The pump can be located in the fuel tank. However, it is desirable to isolate the heat generated by the operating pump from the fuel tank. this is,
This can be done through corresponding measures to prevent heat transfer or measures for thermal insulation, but also by placing the pump outside the fuel tank.

【０００８】本発明による燃料供給系統においては、燃
料タンクへの熱伝導も十分に抑えることが推奨されてい
る。このため本発明においては、部材たる燃料タンク、
往路配管系統及び復路配管系統は、熱伝導が不良である
ように、プラスチック製になっている。これらの部材に
は、断熱性プラスチック、例えばポリウレタン製の断熱
性被覆層を持たせることが出来る。これらの被覆層は、
これら部材に密着的に接合され得るものとする。これ
は、製造技術的には簡単な方法、例えば断熱性プラスチ
ックを各部材へ噴射塗布することによって達成すること
が出来る。噴射弁もまた、プラスチック製とすることが
出来る。In the fuel supply system according to the present invention, it is recommended that heat conduction to the fuel tank be sufficiently suppressed. Therefore, in the present invention, the fuel tank as a member,
The outbound piping system and the inbound piping system are made of plastic so that heat conduction is poor. These members can be provided with a heat insulating plastic, for example, a heat insulating coating layer made of polyurethane. These coating layers
It should be able to be tightly joined to these members. This can be achieved by a simple method in terms of manufacturing technology, for example, by spray-coating a heat-insulating plastic to each member. The injection valve can also be made of plastic.

【０００９】[0009]

【実施例】以下、一実施例についてのみ記載した図面に
よって、本発明の詳細を説明すれば、下記の通りであ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings illustrating only one embodiment.

【００１０】記載された燃料供給系統は、燃料噴射系統
及び噴射弁を有するオット−サイクルエンジン付自動車
用として特定されたものである。自動車及びそのオット
−サイクルエンジンは記載されていない。The described fuel supply system has been specified for a motor vehicle with an Otto-cycle engine having a fuel injection system and an injection valve. The car and its otto-cycle engine are not described.

【００１１】図１による燃料供給系統には、燃料タンク
１、ポンプ２、燃料タンク１から噴射弁４までの往路配
管系統３、及び噴射弁４から燃料タンク１までの復路配
管系統５が属する。燃料タンク１は、換気装置６を備え
ており、更に大気から引き離されている。The fuel supply system shown in FIG. 1 includes a fuel tank 1, a pump 2, a forward piping system 3 from the fuel tank 1 to the injection valve 4, and a return piping system 5 from the injection valve 4 to the fuel tank 1. The fuel tank 1 includes a ventilator 6 and is further separated from the atmosphere.

【００１２】燃料タンク１、ポンプ２、往路配管系統３
及び噴射弁４は、燃料供給装置を形成しており、そのポ
ンプ２は、オット−サイクルエンジンの作動中は、噴射
弁４に供給される燃料の流量が５乃至４０％、とりわけ
１０乃至３０％だけ、燃料消費に対応する流量よりも大
きくなるように操作されている。復路配管系統５は、オ
−バ−フロ−弁７を介して噴射弁４に接続されており、
当該オ−バ−フロ−弁７が過剰流量を復路配管系統５内
に導き入れる。更にオ−バ−フロ−弁７は、噴射弁４内
の燃料圧力の一定維持のために装備されている。Fuel tank 1, pump 2, outgoing piping system 3
And the injection valve 4 form a fuel supply device, the pump 2 of which during the operation of the Otto-cycle engine the flow of fuel supplied to the injection valve 4 is 5 to 40%, in particular 10 to 30% However, it is operated so as to be larger than the flow rate corresponding to the fuel consumption. The return piping system 5 is connected to the injection valve 4 via an overflow valve 7,
The overflow valve 7 guides the excessive flow rate into the return piping system 5. Further, an overflow valve 7 is provided for maintaining a constant fuel pressure in the injection valve 4.

【００１３】燃料タンク１、往路配管系統３、噴射弁
４、及びとりわけオ−バ−フロ−弁７を含む復路配管系
統５には、断熱性の絶縁を施すことが出来、実施例にお
いては被覆層８によって絶縁されている。しかし、真空
絶縁なども適用することが出来る。オ−バ−フロ−弁７
は、オット−サイクルエンジン用の始動操作装置９を介
して、及び／又はオット−サイクルエンジン始動の際の
ポンプ２の圧力を介して開放位置に操作可能である。ポ
ンプ２は、８０％以上の極めて高い効率を持っており、
その結果、出力損失はわずかであり、それ故ポンプ２及
びその駆動部から生ずる熱量もわずかである。実施例の
場合には、作動するポンプ２から発生する熱は、適切な
方法によって燃料タンク１から切り離されている。それ
には、相応の断熱方策を実施することが出来、ポンプ２
がその駆動部と共に燃料タンク１内に存在するようなと
きにも、それを実施することが出来よう。しかし、本発
明の優れた実施形態によっても、また実施例において
も、ポンプ２はその駆動部と共に燃料タンク１の外に配
置されており、その結果、この方法により、作動するポ
ンプ２によって発生する熱は、燃料タンク１から遮断さ
れているのである。The fuel tank 1, the outgoing piping system 3, the injection valve 4, and in particular, the return piping system 5 including the overflow valve 7 can be provided with heat insulating insulation, and in the embodiment, the insulation is provided. Insulated by layer 8. However, vacuum insulation or the like can be applied. Overflow valve 7
Can be operated to the open position via the start-up operating device 9 for the Otto-cycle engine and / or via the pressure of the pump 2 during the start-up of the Otto-cycle engine. Pump 2 has an extremely high efficiency of 80% or more,
As a result, the power loss is small and therefore the amount of heat generated by the pump 2 and its drive is also small. In the case of the exemplary embodiment, the heat generated by the operating pump 2 is separated from the fuel tank 1 by a suitable method. To that end, appropriate insulation measures can be implemented, and the pump 2
Could be implemented when the vehicle is present in the fuel tank 1 with its drive. However, according to the preferred embodiment of the invention and also in the example, the pump 2 is arranged outside the fuel tank 1 with its drive, so that in this way it is generated by the pump 2 which is activated. Heat is cut off from the fuel tank 1.

【００１４】部材たる燃料タンク１、往路配管系統３、
及び復路配管系統５は、合目的にプラスチック製になっ
ている。実施例に示すように、部材に密着結合される断
熱性プラスチックから成る断熱性被覆層８をこれら部材
に対して施す可能性は、ここに存在するのである。[0014] The fuel tank 1 as a member, the outward piping system 3,
The return piping system 5 is made of plastic for the purpose. As shown in the exemplary embodiment, the possibility exists to apply a heat-insulating coating 8 made of a heat-insulating plastic which is tightly bonded to the components, to these components.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による燃料供給系統の概略図である。FIG. 1 is a schematic diagram of a fuel supply system according to the present invention.

【符号の説明】[Explanation of symbols]

１ 燃料タンク ２ ポンプ ３ 往路配管系統 ４ 噴射弁 ５ 復路配管系統 ６ 換気装置 ７ オ−バ−フロ−弁 ８ 被覆層 ９ 始動操作装置 DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Pump 3 Outgoing piping system 4 Injection valve 5 Incoming piping system 6 Ventilation device 7 Overflow valve 8 Coating layer 9 Start operation device

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 噴射弁を有する燃料噴射装置を具備する
オット−サイクルエンジン付自動車用燃料供給系統であ
って、 燃料タンク、 ポンプ、 燃料タンクから噴射弁への往路配管系統、及び 噴射弁から燃料タンクへの復路配管系統を有し、 燃料タンクが換気装置を備え、且つ更に大気から隔てら
れている、燃料供給系統において、 ａ）燃料タンク、ポンプ、往路配管系統及び噴射弁によ
って燃料供給装置を形成し、噴射弁に供給される燃料の
流量が５乃至４０％だけ、燃料消費量に相当する流量よ
りも大きくなるように、オット−サイクルエンジンの作
動中にそのポンプが操作され、 ｂ）復路配管系統がオ−バ−フロ−弁を介して噴射弁に
接続されており、そのオ−バ−フロ−弁が過剰流量を復
路配管系統内に導入し、ｃ）オ−バ−フロ−弁が、オット−サイクルエンジン用
の始動操作装置によって、及び／又はオット−サイクル
エンジン始動の際のポンプの圧力によって、開放状態に
操作可能となっており、 オ−バ−フロ−弁が噴射弁内の燃料圧力を一定に保持す
るために装備されていることを特徴とする自動車用燃料
供給系統。1. A fuel supply system for an automobile with an otto-cycle engine including a fuel injection device having an injection valve, comprising: a fuel tank, a pump, a forward piping system from the fuel tank to the injection valve, and a fuel from the injection valve. In a fuel supply system having a return piping system to the tank, wherein the fuel tank is provided with a ventilator and is further isolated from the atmosphere: a) the fuel supply system is provided by a fuel tank, a pump, an outgoing piping system and an injection valve; formed, only the flow rate is 5 to 40% of the fuel supplied to the injection valve, to be greater than the flow rate corresponding to the fuel consumption, Otto - the pump is operated during the cycle engine operation, b) return piping is O - bar - flow - is connected to the injection valve via a valve, the O - bar - flow - valve introduces excess flow to return pipe system, c) O - bar - flow - There, Otto - for cycle engine
Starting operation and / or otto-cycle
Open due to pump pressure when starting the engine
An automotive fuel supply system operable and provided with an overflow valve for maintaining a constant fuel pressure within the injector. 【請求項２】 請求項１に記載の燃料供給系統であっ
て、ポンプが燃料タンク内に配置されている燃料供給系
統。2. The fuel supply system according to claim 1, wherein the pump is disposed in the fuel tank. 【請求項３】 請求項１に記載の燃料供給系統であっ
て、ポンプが燃料タンク外に配置されている燃料供給系
統。3. The fuel supply system according to claim 1, wherein the pump is disposed outside the fuel tank. 【請求項４】 請求項１乃至３のいずれか一つに記載の
燃料供給系統であって、部材たる燃料タンク、往路配管
系統及び復路配管系統がプラスチックから製作されてい
る燃料供給系統。4. The fuel supply system according to claim 1, wherein the fuel tank, the outward piping system, and the return piping system are made of plastic. 【請求項５】 請求項４に記載の燃料供給系統であっ
て、当該部材が断熱性プラスチックから成る断熱性被覆
層を有する燃料供給系統。5. The fuel supply system according to claim 4, wherein the member has a heat-insulating coating layer made of heat-insulating plastic.
JP6324803A 1993-12-28 1994-12-27 Automotive fuel supply system with otto-cycle engine Expired - Fee Related JP2651126B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4344775A DE4344775A1 (en) 1993-12-28 1993-12-28 Fuel supply system for a motor vehicle with a gasoline engine
DE4344775.9 1993-12-28

Publications (2)

Publication Number Publication Date
JPH07286564A JPH07286564A (en) 1995-10-31
JP2651126B2 true JP2651126B2 (en) 1997-09-10

Family

ID=6506430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6324803A Expired - Fee Related JP2651126B2 (en) 1993-12-28 1994-12-27 Automotive fuel supply system with otto-cycle engine

Country Status (6)

Country Link
US (1) US5501196A (en)
EP (1) EP0661438B1 (en)
JP (1) JP2651126B2 (en)
BR (1) BR9405270A (en)
DE (2) DE4344775A1 (en)
ES (1) ES2114121T3 (en)

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Also Published As

Publication number Publication date
BR9405270A (en) 1995-09-19
JPH07286564A (en) 1995-10-31
DE4344775A1 (en) 1995-06-29
DE59405100D1 (en) 1998-02-26
ES2114121T3 (en) 1998-05-16
EP0661438A1 (en) 1995-07-05
US5501196A (en) 1996-03-26
EP0661438B1 (en) 1998-01-21

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